- Uncontrolled intercurrent illness including, but not limited to ongoing or active infection requiring parenteral antibiotics; uncontrolled diabetes mellitus; chronic symptomatic congestive heart failure; unstable angina pectoris, angioplasty, stenting, or myocardial infarctions within 6 months prior to the time of signature on the ICD; clinically significant cardiac arrhythmia that is symptomatic or requires treatment, or asymptomatic sustained ventricular tachycardia. Subjects with controlled atrial fibrillation that is asymptomatic are eligible.